Vodacom - Restitution Please!!! A1-X1PF-LDZ3AW

Went in to upgrade my package at Vodacom Kenilworth. The trainee sales consultant advised me that I would still pay the same rate as i was then paying for data out of bundle which was R149 for 2GB. The next day I loaded airtime to convert to data but only to realise that I was not going to pay the same rate as normal, now I would pay R249 for 2GB! I immediately went back to the store the next day to inform them of this miscommunication. When I aksed for this to be rectified, the manager was called to deal with my query. This manager \Constantine"only referred to the term and conditions of the contract and said there is nothing I could do"